Aomori, Shin-Aomori, HirosakiOvernight train to/from Sapporo and Aomori. Express Hamanasu Hamanasu was discontinued in mid March, 2016. There is no overnight train service options available to Hokkaido. ... 2010.09.14Aomori, Shin-Aomori, HirosakiExpressHakodate, Shin-Hakodate-HokutoHokkaido AreaOvernight TrainsSapporo, New Chitose Airport